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單項(xiàng)選擇題一個(gè)默認(rèn)的幀中繼WAN被分類為哪種物理網(wǎng)絡(luò)類型？（）

A.點(diǎn)到點(diǎn)
B.廣播多路訪問(wèn)
C.非廣播多路訪問(wèn)
D.非廣播多點(diǎn)
E.廣播點(diǎn)到多點(diǎn)

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1.單項(xiàng)選擇題What is the function of the command switchport trunk native vlan 999 on a？（）

A.It designates VLAN 999 for untagged traffic.
B.It blocks VLAN 999 traffic from passing on the trunk.
C.It createsa VLAN 999 interface.
D.It designates VLAN 999 as the default for all unkown tagged traffic.

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2.多項(xiàng)選擇題What are three features of the IPV6 protocol？（）

A.complicated header
B.plug-and-play
C.no broadcasts
D.checksums
E.optional IPsec
F.autoconfiguration

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3.單項(xiàng)選擇題Which of these represents an IPv6 link-local address？（）

A.FE08：：280e：611：a：f14f：3d69
B.FE81：：280f：512b：e14f：3d69
C.FE80：：380e：611a：e14f：3d69
D.FEFE：0345：5f1b：：e14d：3d69

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4.多項(xiàng)選擇題Which two statements about static NAT translations are true？（）

A.They are always present in the NATt able.
B.They allow connection to be initiated from the outside.
C.They can be configured with access lists，to allow two or more connections to be initiated from the outside.
D.They require no inside or outside interface markings because addresses are statically defined.

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5.單項(xiàng)選擇題Which IPsec security protocol should be used when confidentiality is required？（）

A.AH
B.MB5
C.PSK
D.ESP

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